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Details van artikel 81 van 146 gevonden artikelen
| Titel: |
Methane production in aerobic oligotrophic surface water in the central Arctic Ocean |
| Auteur: |
E. Damm E. Helmke S. Thoms U. Schauer E. Nöthig K. Bakker R. P. Kiene |
| Verschenen in: |
Biogeosciences discussions |
| Paginering: | Jaargang 6 (2009) nr. 6 pagina's 10355-10379 |
| Jaar: |
2009 |
| Inhoud: |
A methane surplus relative to the atmospheric equilibrium is a frequent feature of ocean surface water. Despite the common fact that biological processes are responsible for its origin, the formation of methane in aerobic surface water is still poorly understood. We report on methane production in the central Arctic Ocean, which was exclusively detected in Pacific derived water but not nearby in Atlantic derived water. Both water masses are distinguished by their different nitrate to phosphate ratios. We show that methane production occurs if nitrate is depleted but phosphate as P source is available. Apparently the low N:P ratio enhances the ability of bacteria to compete for phosphate while the phytoplankton metabolite dimethylsulfoniopropionate (DMSP) is utilized as a C source. This was verified by experimentally induced methane production in DMSP spiked Arctic sea water. Accordingly we propose that methylated compounds may serve as precursors for methane and thermodynamic calculations show that methylothrophic methanogenesis can provide energy in aerobic environments. |
| Uitgever: |
Copernicus GmbH (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 81 van 146 gevonden artikelen
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